Cell Types of the Pars distalis of the Hedgehog (&lt;i&gt;Erinaceus europaeus&lt;/i&gt; L.) Adenohypophysis: Cytological, Immunocytochemical and Ultrastructural Studies

Girod, C.; Lh&eacute;ritier, M.; Trouillas, J.; Dubois, M P.

doi:10.1159/000145594

Cited by 6 publications

(4 citation statements)

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“…Another cell population which was immunonegative for hypophyseal glycoprotein hormones could be characterized by expression of the S-100 protein [Girod et al, 1986]. However, this study could only demonstrate a few S-100-positive cells in the Pt and Pd whereas a lot of cells remained unstained.…”

Section: Discussionmentioning

confidence: 54%

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The Pars tuberalis of the Monkey (Macaca fascicularis) Hypophysis: Cell Types and Hormone Expression

Bock

Böckers

Bockmann

et al. 2001

Cells Tissues Organs

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The pars tuberalis (Pt) of most mammalian species contains specific cells which are structurally and functionally different from the pars distalis (Pd) cells. Pt-specific cells possess melatonin receptors and reveal morphological changes dependent on the duration of the photoperiod. Furthermore, in hamsters the transmission of photoperiodic stimuli to the endocrine system is influenced by melatonin, an effect which is likely to be mediated by Pt-specific cells. In monkeys, however, only little is known about this cell type. Therefore, we studied the ultrastructural differentiation of Pt-specific cells and describe the expression of different hormones and their mRNA by immunohistochemistry and in situ hybridization. Apparently the Pt consists of (1) cells similar to gonadotropic cells of the Pd, (2) folliculostellate cells and (3) a cell population which is morphologically and functionally clearly distinct from all other cell types found in the Pd. Morphologically they resemble the Pt-specific cells found in other species. Regarding the expression of secretory products there is evidence that they transcribe and translate the β-TSH subunit. Although there is a strong signal for the mRNA of the common α-chain, protein staining is much weaker. POMC mRNA is expressed in the Pt while there is no evidence for PRL mRNA. The present results lead to the conclusion that the Pt of the monkey contains Pt-specific cells which express different hormonal subunits as was already shown for other species. In context with previous findings of melatonin receptors in the monkey Pt further investigations are necessary to establish the possible role of Pt-specific cells in the photoperiod-dependent generation of endocrine rhythms.

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Section: Discussionmentioning

confidence: 54%

“…Some cells can be marked with antibodies against S-100 protein, other cells with vimentin. Therefore, the existence of different subpopulations must be considered [Girod et al, 1986;Kameda, 1996a, b]. (3) In the last years special interest was focussed on Pt-specific cells which are not comparable to any other cell type of the Pd.…”

Section: Introductionmentioning

confidence: 99%

The Pars tuberalis of the Monkey (Macaca fascicularis) Hypophysis: Cell Types and Hormone Expression

Bock

Böckers

Bockmann

et al. 2001

Cells Tissues Organs

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“…The present investigation was carried out on the pituitary glands of the hedgehogs which were used for identification of the somatotropic and prolactin cells [Girod et al, 1982[Girod et al, . 1983.…”

Section: Methodsmentioning

confidence: 99%

“…In two previous papers published in this journal [Girod et al, 1982[Girod et al, . 1983, we reported the cytological.…”

Section: Introductionmentioning

confidence: 99%

Cell Types of the Pars distalis of the Hedgehog (Erinaceus europaeus L.) Adenohypophysis: Cytological, Immunocytochemical and Ultrastructural Studies

Girod¹,

Lhéritier²,

Trouillas³

et al. 1985

Cells Tissues Organs

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Staining and histochemical methods, immunofluorescence and electron microscopy were used to individualize the opiocorticomelanotropic cells in the adenohypophysis of the non-hibernating hedgehog. One cell type was differentiated; its characteristics at the electron-microscopic level were presented. Immunofluorescence has confirmed the functional significance of this cell type and the validity of the denomination ‘opiocorticomelanotropic cells’.

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References

Stephan¹,

Baron²,

Frahm³

1991

Insectivora

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Cell Types of the Pars distalis of the Hedgehog (<i>Erinaceus europaeus</i> L.) Adenohypophysis: Cytological, Immunocytochemical and Ultrastructural Studies

Cited by 6 publications

References 5 publications

The Pars tuberalis of the Monkey <i>(Macaca fascicularis)</i> Hypophysis: Cell Types and Hormone Expression

The Pars tuberalis of the Monkey <i>(Macaca fascicularis)</i> Hypophysis: Cell Types and Hormone Expression

Cell Types of the Pars distalis of the Hedgehog (<i>Erinaceus europaeus</i> L.) Adenohypophysis: Cytological, Immunocytochemical and Ultrastructural Studies

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